Island



(No Model.) 2 Sheets-Sheet l.

'Z R. MAGOMBBR.

WINCH.

Patented Peb. 14,1882.

/ Fig. 2 l

WITNESSESI NVENTOR ///AyL Zr/l@ Rjcomer,

(No Model.) 2 Sheets-Sheet 2.

Z. R. MACOMBER.

WINCH.

No. 253.733 Peeeneed Peb.14,188.2.-U e

|N E N T O Rf Zebedelijacwner,

WITNESSES;

@ffii/wf//My we m UNITED vSTATES PATIENTY OFFICE.

ZEBEDEE R. MAOOMBER, OF PROVIDENQE, VRHODE ISLAND, ASSIGNOR OF ONEHALFTO WILLIAM H. BABRON, OF SAME PLACE.

WINCH.

SPECIFICATION forming part of Letters Patent No. 253,733, dated February14, 1882.

- Application led November 11, 1881. (No model.)

To all whom it may concern Be it knownthat I, ZEBEDEE R. MAooMBER, ofthe city and county of Providence, State of Rhode Island, have inventeda new and useful Improvement in Winches; and I hereby declare that thefollowing is a full, clear, and eX- aet description of the same,reference being had to the accompanying drawings, forming part of thisspecification.

The object of this invention is to so construct a winch or hoist thatwhen power is applied to raise a weight the barrel will be clamped so asto revolve and wind the rope, chain, or cable, and when the power issuddenly reversed the barrel will be free'toyunwind.

The invention is applicable to well-curbs, hoists, windlasses, capstans,and all devices where a drum is used to wind on rope, chain, or cable.

Figure l is a top view of a well-curb, showing the barrel, thedriving-head, the shaft provided with a ratchet-clutch, and the crankfor turning the same. Fig. 2 is a sectional view. Fig. 3 is a sectionalview of a modification of the device, showing a hand-wheel by means ofwhich the barrel is held against the drivinghead, and by which the samecan be released. Fig. et is a sectional view of a roller-clutchconstructed to preventthe rotation of the shaft in one direction. Fig 5is a view, partly in section, ofthe end of the driving-shaft, showing amodification of Fig. 2. In this case the crank is loose onnthe shaft,and is forced against the sleeve by means of a cam.

In the drawings, A is the driving-shaft.

B is the drivin g-head secured to the drivin g shaft. Y

C is the barrel, loose on the driving-shaft.

I) is a sleeve surrounding the drivingshaft.

E. is the crank, secured to the driving-shaft by a screw-thread.

F is a ratchetwheel secured to the drivin ga shaft, and G is a pawl.

The operation is as follows: The drivingshaft being held by the pawl andratchet against rotation in one direction, the shaft can be rotated onlyin the opposite direction. As soon asthe crank E is turned in thisdirection it is brought to bear against the end of the sleeve D` as itturns on the screw-thread, and

the screwthread suiiiciently to release the bari rel from frictional contact with the drivinghead, and the barrel is free to revolve.

In place of the pawl and ratchet any other clutch that will hold theshaft in one direction may be used. Figs. 3 vand 4 represent such aclutch. t' is a cam fixed on the shaft A, and K a sleeve xed on thebracket or forming part of the same.- Three balls or rolls areinserted,

and the shaft is no w free to turn in one direction only.'

The crank may be fixed to the driving-shaft A, or a pulley may be used,and the device for forcing the barrel against. the driving-head may beoperated by means of the wheel h, as is shown in Fig. 3. In this casethe shaft may run contnuallyin the same direction, and the barrel bereleased to run down the rope, cable, or chain, when it can be readilyconnected with the weight hoisted. The crank can also be secured looseon the driving-shaft and provided at one side with a cam-face bearingagainst the cam l, so as to bear against the sleeve D when turned in onedirection, and re leasing the same and the barrel when turning in theopposite direction. In this case-the backward motion of the crankcannotv be so readily turned off from the shaft.

By the use of either of these devices a simple, durable, and convenientwinch is produced in which the rope, chain, or cable is allowed tounwind, and is controlled by the friction between the barrel anddriving-head, which can be regulated to suit any emergency in paying outcable, dropping anchor. or lowering a bucket.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. rIhe combination, with the driving-shaft, of adevice for holding said shaft against rotation in onedirection,adriving-head secured to said shaft, a barrel loose on theshaft, a

crank mounted upon the shaft and having roo movement at timesindependent of the rotation of said shaft, and e sleeve surrounding theshaft and operated by the crank for pressing the barrel against thedriving-head in 5 lockingfrictional contact and releasing it from saidlookin g contact, substantially as described. 2. The combination, Withthe drivingshaft,

of a device for holding it against rotation`in one direction, a.driving-head lfixed upon the 1o sha'ft, the barrel C loose upon theshaft, the

sleeve D, having :i longitudinal movement upon the shaft, e device formoving said sleeve endwise and against the barrel, and thereby movingthe barrel into locking frictional contact With the driving-bead, andmeans for I5 turning the shaft in one direction, substantially asdescribed.

ZEBEDEE R. MACOMBER.

Witnesses:

J. A. MILLER, Jr., HENRY J. MILLER.

